Microservices is one of the most trending buzzword, along with the Internet of Things (IoT). Everyone talks about microservices and everyone wants to have microservices implemented. The term ‘microservice’ was first discussed at a software architects workshop in Venice, in May 2011. It’s being used to explain a common architectural style they’ve been witnessing for some time. With the granularity of the services and the frequent interactions between them, securing microservices is challenging. This post, which I published on medium presents a security model based on OAuth 2.0, JWT and XACML to overcome such challenges.